Improvement in hydrostatic lamps



T. G. GOODFELLOW.

Hydrostatio Lamp.`

No. 206,313I

Patented July 23,1878.

olllllllllillllillllll* I wrmxassas:

NFETRS, PHOTO-LITHOGMPHER;WASHINGTON. D C,

UNITED STATES' PATENT OEEIGE.

THOMAS C. GOODFELLOIV, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN HYDROSTATIC LAMPS.

Specification llumng part of Letters Patent N0. 206,313, dated July .23,1878; application filed April 5 To all whom it may concern:

Be it known that I, THOMAS G. GooDFEL- LOW, of Chicago, in the county ofCook and State of Illinois, have invented certain Improvements inHydrostatic Lamps, of which the following is a specification:

In the accompanying drawing, Figure l shows an elevation, and Fig. 2 acentral vertical section, of my improved lamp.

Referring to the drawing, A represents an ordinary burner placed above areceptacle, B, designed to hold the depending end of the wick C and theoil which comes in immediate contact therewith.

The receptacle B is above and may beV made to rest upon a standard, D,which is iu turn supported by the base E. Both standard and base arehollow, and each forms a reservoir, and I designate them as thewater-reservoir77 and the oil-reservoir, respectively.

The receptacle B and base E are connected by a small vertical tube, m,extending from the bottom of one to the top ofthe other. In theconstruction shown in the drawing this tube passes through the standard.The latter has no opening from the receptacle B, but

is connected with the oil-reservoir by a trapshaped pipe, o, inserted inits bottom, and discharging at the bottom of the oil-reservoir. Anair-opening, s, is provided at the top of the water-reservoir, forreasons which will be obvious.

In the lamp thus constructed I employ a body of water or other fluidwith a specific gravity superior to that of oil, for the purpose ofraising the latter to the wick or burner, and my design has been to soconstruct the lamp that when the requisite quantity of water has beenput within it there will be no necessity for lremoving the waterwhenever the oil is replenished, or, in other words, to so arrange theparts of the lamp as to give the oil,

in filling, a sufficient head to overcome the superior gravity of thewater and drive it back into the water-reservoir, thus enabling the oilto make room for itself, and this without irnpairing the performance bythe water of the duty assigned it.

, 1ers.

To understand this it is only necessary to describe the operation of theapparatus shown7 which is as follows:

I rst put into the lamp the necessary amount ot' water, preferablythrough .the receptacle B, though an appropriate opening may be providedin the water-reservoir for the purpose, if desired. This water, ofcourse, finds its way into the base E either through the tube m or trapo. I then pour oil into the receptacle B, from whence it ows into thetube m and oil-pot E, thus forming a column of sufficient height toenable it to overcome the resistance of the water and force it up intothe water-reservoir through the trap o. The pouring is continued, ofcourse, until the water is raised sufficiently to balance the oil, withthe tube full and the receptacle B at least partially so. When this hasbeen done the lamp is ready for operation. This balance is always keptup by the water following the oil as it is consumed in use.

When the lamp is relilled with oil the water is driven back to its placein position to act again as a lift or forcing medium to send the oil tothe burner.

It is thus seen that the water moves backward or forward in the tworeservoirs, according as the oil is being replenished or exhausted.

Of course, there will be some natural evaporation of the water, whichwill occasion a deficiency necessary to be supplied.

Obviously any other illin g-point from which the necessary head of oilcan be obtained may be substituted or used in illin g instead of thereceptacle B.

By my construction I not only obviate all necessity for withdrawing thewater previous to the replenishiu g of the oil-supply, but also dispensewith the openings which would be necessary for that purpose. The oil-potand burner are widely separated, thus securiu g safety againstexplosion, and an increased weight is imparted to the base, which tendsto prevent overturning.

The trap o acts to deter the oil from entering the water-reservoir,which is an important result, because, if the oil should enter, it wouldrise to the top of the body of witter therein, and not issue thenceuntil the Water be wholly withdrawn.

I claim- The lamp for heating or illuminating` purposes wherein arecombined an oil-reservoir :it the bottom, it water-reservoir locatednext higher than the oil-reservoir, and connected Jtherewith by Lsuitable pipe, und in wick or other filling-receptacle, located abovethe wuter-reservoir and connected with the oil-reservoir, the pipe fromthe Water-reservoir to the oil-reservoir being provided with :n trap orcutoff7 substantially as and for the purpose set forth.

THOMAS G. GOODFELLOW.

Witnesses:

EDW. S. EVARTS, 'FORDE R. SMITH.

